Tell him that you have joined a fundamentalist group and from now onwards you will neither look at him, or talk to him, or shake his hand, or be fed ice-cream by him.
Yes I this boy is interested in you, so if you do not want his further attentions, then tell him straight that u do not feel this is right by you. Its not diff to do, just say you been thinking about it and now u want to tell him.
Otherwise prepare for your marriage to this lad, perhaps he might b ok for u afterall.
i will tonight!